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' (M odelJf BORING MAGHINE.

INVENTOR;- J ?%mi z/ Patented July 24, 1883.

L WITNESSES: %/;0% 16! Maw f ATTORNEYS.

UNITED ST TES PATENT OFFIcE.

FERDINAND F. HARTVVIOH AND HERMAN F, HARTVICH, OF ONAGA, KANS.

BORING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 281,871, dated July 24, 1883.

Applieation filed March 29, 1883. (ModeL) To aZZ whom it may concern.-

Be it known that we, FERDINAND F. HART- WICI-I and HERMAN F. HARTWICH, both of Onaga, in the county of Pottawatomie and State of Kansas, have invented a new and Improved Boring-Machine, of which the following is a full, clear, and exact description.

Our invention consists of animproved feeding mechanism, and a system of change-gearing for driving the same, whereby the feedgear can be reversed to withdraw the auger or other boring-tool, while the tool continues to revolve in the same direction as when boring, to withdraw the chips from the hole,

the object being to provide a simple and effi cient machine for boring wood or iron, and especially for boring stone in stone-quarries, for splitting and blasting the stone, all as hereinafter fully described.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of our improved machine with one of the top beams broken off. Fig. 2 is a side elevation with some parts broken out. Fig. 3 is a sectional elevation on line as w of Fig. 2. Fig. 4 is a detail of the boringmandrel and its driving-pinion. Fig. 5 is a section of the feed device on line g y of Fig. 3, and Fig. 6 is a detail of the feedinggear to show the method of changing the motion for feeding faster or slower.

We arrange a boring-mandrel, a, in the bearings I) of a yoke, c, mounted on any suitable frame, (I, say, by the upright e, cross-beam f, feed-nut socket g, and braces 71, the upright e and the yoke 0 being connected with the said feed-nut socket, and we gear the mandrel with the crank wheel '6 by the pinion z and the large crown driving-wheel j, the latter being fitted on the shaft Z of the crank-wheel, and the pinion i being confined between the bearings b of the yoke c, and fitted to the mandrel by a feather, allowing the mandrel to slide up and down suitably for the purposes of a boring-mandrel. To feed the mandrel downward for carrying the boring-tool in the chuck-jaws m, and raise it up for withdrawing the tool, we fit it with a socket-nut, a, and a male nut, 0, in the stationary feeding-socket 9, below and above the collar 1), respectively, so. that the socket-nut being fitted in guides q to prevent it from turning, but to allow it to slide up and down freely, and the male nut obeing geared, by its tubular stem 8 and bevel-wheels t u, with the feed-shaft 'v, the nut 0 may be made to feed the drill down, when turned one way,

by forcing the lower end of the socket-nut down 011 the collar w of the chuck, and to raise the drill up, when turned the other way,

by causing said socket-nut to lift on the collar p. The feed-shaft o is geared with the crank-wheel shaft Z, for being operated to feed the drill down, by the wheel as, pinion '1, shaft 6 5 2, wheel a, and the pinion b, and by reversing the motion of the crank-wheel it will raise the drill out of its hole by turning it backward; but in order to continue it in the forward rotation at the same time that it is being raised out of the hole, in order that it may clear the hole of the chips, we have connected wheel a with its shaft by a clutch, go, and added a backing-out gear consisting of the wheel (1, gearing with pinion 1 and the pinion 6, gearing with the toothed face of the crown-wheel j and connecting with the shaft f, on which said pinion e and wheel (1 are mounted by a clutch, g, and these clutches c;

g are so arranged that by one movement of a lever, h, connecting with them both, one will be connected and the other disconnected, whereby the motion of the feed-nut maybe reversed at any time while continuing to run the drill in the forward direction to cause it {to clear 8 5 the hole of the chips. The lever h is to be held in the different positions by catch an and r a pin a. The drill is to have shoulders on its. shank, to be held in the shouldered grooves z" of the jaws, which are pivoted to the collar 10, to open to receive and release the drill, and

are provided with a ring, j, to hold them on the drill.

The machine is designed to be employed for I working angers, stonedrills, 1netaldrills, and other boring-tools, the base to be set on the timber or stone to be bored or drilled, and a bed-plate, k, to be inserted in grooves of the postsunder the mandrel to hold small pieces of iron or other material.

For altering the feed mechanism to feed faster or slower, we propose to have interchange able driving pinions a, to put 011 larger or smaller ones, and will have a collar or collars,

2 asmsn Z to put under pinion t, to raise it up or let it down to suit the size of the pinion u, as in Fig. 6.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. In a boring -1nachine, the combination, with drill-shaft a, of the shaft 11, connected therewith by gear t a, the shaft 2, connected with shaft v by gear on 3 and carrying the clutch c, the shaft f connected with shaft 2 by gear (1 y, and carrying the loose pinion 0 and clutch g, and the shaft Z, carrying crank-whee1 i, said shaft I being connected with shaft (4 by gear j z, and with shaft 2 by gear a b, whereby the drill may be operated, as described.

2. The feeding mechanism for the mandrel of a boring or drilling machine, consisting of the stationary socket 9, having guides q, sliding socket-nut n, fitted on the ways of the 20 FERDINAND F. HARIWVICH. HERMAN F. HARTWIOH.

Vitnesses:

HENRY CRoss, M. HARTwIoI-I. 

